EP 2340533 A4 20120321 - UNIPOLAR GRAY SCALE DRIVE SCHEME FOR CHOLESTERIC LIQUID CRYSTAL DISPLAYS
Title (en)
UNIPOLAR GRAY SCALE DRIVE SCHEME FOR CHOLESTERIC LIQUID CRYSTAL DISPLAYS
Title (de)
UNIPOLARES GRAUSTUFENANSTEUERSCHEMA FÜR CHOLESTERISCHE FLÜSSIGKRISTALLANZEIGEN
Title (fr)
SCHÉMA DE COMMANDE D ÉCHELLE DE GRIS UNIPOLAIRE POUR DES ÉCRANS À CRISTAUX LIQUIDES
Publication
Application
Priority
- US 2009056876 W 20090915
- US 23694108 A 20080924
Abstract (en)
[origin: US2010073405A1] A unipolar gray scale drive scheme for passive matrix displays, more specifically, cholesteric liquid crystal displays, capable of creating any number of desired levels of gray scale. The drive scheme is single stage and can use either an amplitude modulation or a pulse width modulation column voltage signal in combination with a selecting row voltage signal to drive a pixel receiving the two intersecting signals to a desired level of gray scale.
IPC 8 full level
G02F 1/133 (2006.01); G09G 3/36 (2006.01)
CPC (source: EP KR US)
G02F 1/133 (2013.01 - KR); G09G 3/36 (2013.01 - KR); G09G 3/3629 (2013.01 - EP US); G09G 3/2011 (2013.01 - EP US); G09G 3/2014 (2013.01 - EP US); G09G 2300/0486 (2013.01 - EP US)
Citation (search report)
- [XI] WO 2008023415 A1 20080228 - FUJITSU LTD [JP], et al & US 2009153757 A1 20090618 - NOSE MASAKI [JP]
- [XI] WO 2005114633 A1 20051201 - EASTMAN KODAK CO [US], et al
- See references of WO 2010036531A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
DOCDB simple family (publication)
US 2010073405 A1 20100325; US 8269801 B2 20120918; CN 102160110 A 20110817; CN 102160110 B 20141105; EP 2340533 A2 20110706; EP 2340533 A4 20120321; EP 2538403 A2 20121226; EP 2538403 A3 20130109; JP 2012503795 A 20120209; KR 20110057251 A 20110531; TW 201023163 A 20100616; WO 2010036531 A2 20100401; WO 2010036531 A3 20100617
DOCDB simple family (application)
US 23694108 A 20080924; CN 200980137172 A 20090915; EP 09816701 A 20090915; EP 12184471 A 20090915; JP 2011529104 A 20090915; KR 20117008960 A 20090915; TW 98132114 A 20090923; US 2009056876 W 20090915